Author: Mikael Berggren (IPNL, Université Claude Bernard Lyon I,VILLEURBANNE,FRANCE)
Title: LEP results on SUSY: Sfermions and R-parity violation
Abstract: We present the most recent results on searches for the scalar supersymmetric partners of the SM fermions from the four LEP experiments, ALEPH, DELPHI, OPALand L3. Most results include the data collected 1998 at E_CMS=189 GeV. Each ofthe experiments collected between 160 and 180 pb^-1 of data at this energy. Asno excess of events with respect to the numbers expected from SM processes wereseen, significant improvements on the limits for such processes are reported. The sfermion limits both consider the mSUGRA MSSM scenario with conserved R-parity, and with R-parity violation. We also report on the searches for neutralinos and charginos in the R-parity violating mSUGRA scenario. Here we show that the limits in the mu - M_2 parameter space are at the kinematic limitfor chargino production for all m_0. Hence, violating R-parity does not weakenthe limits for these processes.
Comments: 7 pages (ReVTeX), 4 figures (eps). Contributed to DPF 99, UCLA, Jan.1999.